期刊
JOURNAL OF WATER PROCESS ENGINEERING
卷 34, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.jwpe.2020.101134
关键词
Porous ceramsites; Pore characteristics; Organic degredation; Biofilm
Porous ceramsites were prepared using the high silicon iron tailings as the matrix. The specific surface area, bulk density and porosity of the obtained porous ceramsites are 5.54 m(2)/g, 0.78 g/cm(3) and 49.8 %, respectively. Subsequently, biofilm was inoculated and domesticated on the surface of ceramsites in a biological aerated filter (BAF) for the removal of organic pollution in water. The removal rates of chemical oxygen demand (COD), ammonia (NH3-N), and total phosphorus (T-P) in the organic wastewater were 91 %, 85 %, and 80 % respectively. It was found out that during the maturation diffusion period, the pore size between ceramsites had a significant impact on the biofilm adhesion growth and the effect of degradation organic matter. In addition, in order to better understand the removal mechanism of biofilm for COD, NH3-N and T-P, an analytical model for the flow field and resistance characteristics between pores of biofilm was established, which may provide more valuable references for the practical utilization of porous ceramsites.
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